Do normal estimated tax rules still apply even in a tax year where a large capital gain occurs on a house sale?

[Greg Brown]

Specifically, if I've met the normal estimated tax rules based on previous years' taxes owed, can I wait until tax filing to pay the large capital gains tax from the sale.

[LeonardS · Accepted solution]

Yes, if you paid at least 90% of the tax you owe for the current year or 100% of the tax you owed for the previous tax year, the IRS will not charge you an underpayment penalty. 

[Greg Brown]

Thank you. Exactly the answer I was looking for.